RT1052野火基于 RT-Thread 移植的littlevgl图形库

# Littlev Graphics Library  **LittlevGL provides everything you need to create a Graphical User Interface (GUI) on embedded systems with easy-to-use graphical elements, beautiful visual effects and low memory footprint.** https://littlevgl.com Check out the [References](https://blog.littlevgl.com/2018-12-26/references) where LittlevGL was used. You can add your project too! ## Key features * **Powerful building blocks** buttons, charts, lists, sliders, images, etc. * **Advanced graphics** with animations, anti-aliasing, opacity, smooth scrolling * **Various input devices** touch pad, mouse, keyboard, encoder, buttons, etc. * **Multi-language support** with UTF-8 encoding * **Fully customizable** graphical elements * **Hardware independent** to use with any microcontroller or display * **Scalable** to operate with little memory (50 kB Flash, 10 kB RAM) * **OS, External memory and GPU** supported but not required * **Single frame buffer** operation even with advances graphical effects * **Written in C** for maximal compatibility * **Simulator** to develop on PC without embedded hardware * **Tutorials, examples, themes** for rapid development * **Documentation** and API references online ## Porting In the simplest case you need 5 things: 1. Call `lv_tick_inc(x)` every `x` milliseconds in a Timer or Task (`x` should be between 1 and 10) 2. Register a function which can **copy a pixel array** to an area of the screen. 3. Register a function which can **read an input device**. (E.g. touch pad) 4. Copy `lv_conf_templ.h` as `lv_conf.h` and set at least `LV_HOR_RES`, `LV_VER_RES` and `LV_COLOR_DEPTH`. 5. Call `lv_task_handler()` periodically every few milliseconds. For a detailed description visit https://github.com/littlevgl/lvgl/wiki/Porting Or check the [Porting tutorial](https://github.com/littlevgl/lv_examples/blob/master/lv_tutorial/0_porting/lv_tutorial_porting.c) ## Project set-up 1. **Clone** or [Download](https://littlevgl.com/download) the lvgl repository: `git clone https://github.com/littlevgl/lvgl.git` 2. **Create project** with your preferred IDE and add the *lvgl* folder 3. Copy **lvgl/lv_conf_templ.h** as **lv_conf.h** next to the *lvgl* folder 4. In the lv_conf.h delete the first `#if 0` and its `#endif`. Leave the default configuration for the first try. 5. In your *main.c*: #include "lvgl/lvgl.h" 6. In your *main function*: * lvgl_init(); * tick, display and input device initialization (see above) 7. To **test** create a label: `lv_obj_t * label = lv_label_create(lv_scr_act(), NULL);` 8. In the main *while(1)* call `lv_task_handler();` and make a few milliseconds delay (e.g. `my_delay_ms(5);`) 9. Compile the code and load it to your embedded hardware ## PC Simulator You can test the graphics library in a PC simulator, if you don't have an embedded hardware. The simulator uses [SDL2](https://www.libsdl.org/) library to emulate a display on your monitor and a touch pad with your mouse. There is a pre-configured PC project for **Eclipse CDT** in this repository: https://github.com/littlevgl/pc_simulator ## Related repositories * PC simulator: https://github.com/littlevgl/pc_simulator * Projects: https://github.com/littlevgl/lv_projects * Examples: https://github.com/littlevgl/lv_examples * Drivers: https://github.com/littlevgl/lv_drivers ## Screenshots     ## Contributing See [CONTRIBUTING.md](https://github.com/littlevgl/lvgl/blob/master/docs/CONTRIBUTING.md) ## Donate If you are pleased with this graphics library, found it useful, or are happy with the support you got, please help its further development: [](https://littlevgl.com/donate)